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Am J Vet Res. 1986 Oct;47(10):2269-71.

Transmission of Anaplasma marginale Theiler by males of Dermacentor andersoni Stiles fed on an Idaho field-infected, chronic carrier cow.


The role of ticks and carrier cattle in epizootics of bovine anaplasmosis was further clarified by demonstrating unequivocally, for the first time, that male ticks fed on a chronic carrier cow naturally infected with Anaplasma marginale can transmit this parasite intrastadially and biologically when subsequently fed on susceptible cattle. These data indicate that field epizootics of acute anaplasmosis may be initiated by males of tick vector species that feed on carrier cattle and subsequently transfer to susceptible cattle.

[Indexed for MEDLINE]

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